Bobbin for braiding and bobbin machines.



E. SCHM-ACHTL.

BOBBIN FOR BRAIDING AND BOBBIN MACHINES. APPLICATION FILED NOV. 14. 1913. RENEWED JAN. 5. ms.

1 $419,089a Patented Aug. 3, 1915.

dllomwy COLUMHIA PLANOUKAPH co WASHINGTON, D, c.

,EDUARD .SCHMACHTL, or onnn-wAnrnnsnoar, AUSTRIA-HUNGARY.

BOBBIN FOR BRAIDINGAND BOBBIN MACHINES.

Specification of Letters Patent.

Application filed November 14, 1913, SeriaI'NO. 801,065. Renewed January 5, 1915. Serial N o. 670.

To all whom it may concern Be it known that I, EDUARD SOHMAOHTL, a subject of the Emperor of Austria-Hungary, and resident of Ober-Waltersdorf,

Austria-Hungary, have invented certain new and useful Improvements in Bobbins for Braiding and Bobbin Machines.

Bobbins for braiding and bobbin machines as known hitherto with a spool mounted horizontally in stationary bearings on the bobbin frame have this drawback that the weight for applying tension to the thread is directly supported thereon and the thread runs off at a varying angle whereby the threading is rendered more diiiicult and an uneven tension is set up in the thread with the further result of a greater loss of time in fixing on the spools as well as increased friction on the thread and a straining of the material owing to twisting of the thread. All these disadvantages are according to the present invention avoided by a rack mounted on the bobbin frame so as to be capable of sliding up and down, having at its lower end a gap without teeth, being loaded to the extent necessary to afford the desired tension on the thread, and engaging with a pinion secured on the spool spindle so that both pinion and spool according to a lengthening or shortening of the thread are turned in the one direction or are permitted to turn in the other direction in order that a constant tension can be maintained on the thread, permitting however the delivery of the thread as soon as the pinion arrives at, and turns freely in the gap without teeth in the rack when this is in its highest position.

The subject-matter of this invention is illustrated in the accompanying drawing by way of an example, Figures 1 and 2 being views at right angles to one another of the improved bobbin. Fig. 2 being partly in sec tion and Fig. 3 a section on the line AB of Fig. 1 looking in the direction of the .arrow.

Referring to the drawing the guide-way plates (not shown) of the braiding machine engage in the space a between the two sup porting flanges Z). The upper flange 6 carries the single-bar bobbin frame 0 in which a horizontal spindle (Z is rotatably mounted. Upon the one hand a spool e is secured on the spindle cl and on the other hand a small pinion 7, which engages with a rack 9 reciprocating up and down along the bar 0.

At the lower end of the rack there is a gap it where there are no teeth and at each end there is a projecting guide piece 2' for guid ing the rack along the bar. The upper guide piece 2' supports a weight 70 adapted to slide along the bar 0. The spool e rotates with the spindle (Z and is securely held against any spontaneous axial movement by two plate springs m and yet so as to be readily mounted. The variation in length of the thread which arises, when the ma chine is running, owing to the variation in the distance betweenthe bobbin and the braiding point is taken into account in so Patented Aug.3, 1915.

far that by the shortening of the thread 0 I the spool e and pinion f, are caused to r0- tate so that the pinion raises the rack 9 together with the weight whereas on a lengthening of the thread 0 the rack g is lowered and the pinion f as well as the spool 6 caused to rotate backward so that the thread always remains under a constant tension. A withdrawal of thread by a backward movement of the spool takes place when the rack g is in the highest position and the pinion f arrives in the gap it and rotates there freely the spool c then allowing the thread 0 to run off to an extent corresponding to the length last delivered and worked up into the goods. Hereupon the rack 9 again falls and rotates the pinion so that the length of thread drawn off is again wound on the spool e for subsequent use. The process described then repeats itself in regular order. A variation in the load on the thread 0 that is to say the necessary tension on the same can be attained by a substitution in the easily removable weight 76. The thread 0 as may be seen always runs off at the same angle so that a perfectly even tension on the thread is secured. As the thread 0 has to be drawn through one guideeye only, the threading is very much easier. Further a considerable economy in time is effected when mounting the spool the friction on the thread in its guides is diminished and since there is no twisting of any kind there is no excessive straining of the material. The mode of transmitting the load to the thread also results in a constant thread-tension.

I claim:

1. In a device of the character the combination of a guid mounted on the guide bar with teeth, a shaft mounted bar, said shaft receiving aspool, a pinion on the shaft, said pinion meshing With the teeth, and means tending to move the slide on the gulde bar against the tension of t he thread being fed from the spool.

10 tom, and provided with teeth above said EDUARD SCHMAOHTL;

Witnesses:

LUG RnsnK, AUGUST FUGGERas;

Copies ofzthis patent may. be obtained for five cents each, by a ddre ssin g the Commissioner of Patentsv Washington, D. 0.? 

